1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665b0e4f94135b0857960612a4d968a3b06d79f8894d039957e93debfb2c8ed1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c55db1d7-5afa-4601-92f4-8866a3f0db1c.json and https://artists.proofprofile.net/proofs/artist/c55db1d7-5afa-4601-92f4-8866a3f0db1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09712c9e5d45ffd589e9411df5a1c6fea6d9cfef3bc7073c4f529bcb23c16d82. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEP860800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c545902e3837d17458857f011917cebb0426426b7e7dabad6d8d671678158. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEP860800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04e35d42acb3d1b0050a9249d3002e10749574c5d2de64b0048fec6b447a06a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ4X0701701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e98bf0bfdaf6a28e51e932f60be9f1ea41235f7c7e1384767899aa819ea3b89. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATE691302905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d8b069298b4848e52500fbdf77660c1a90fe2ff827fabcca8e77397df8e1ac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATE691302907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e98bf0bfdaf6a28e51e932f60be9f1ea41235f7c7e1384767899aa819ea3b89. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATE691302905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d8b069298b4848e52500fbdf77660c1a90fe2ff827fabcca8e77397df8e1ac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATE691302907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32afce90593fa597511b13928c7f234aa41c4eb7c175e88cd4f73922d0c71fdc. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLM791610004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af3401f88abeffa0315c3b5286e82fba1a307a5f962e48d4fa5b52023b0e158. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK41035275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb08a6f7ebe5c41e909509c219879dbc7e7a14087abb6fc12e13aeca2a9febd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLL561807401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16003e1c828818cdd5571da793f524ad628fb04d9c10765c7086283e031a8842. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF271830302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d113e28efbc077f6a1047e1bf1827e6f82c05afe67142040b28f031c17a096b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF271830303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95903f98019bfdb53a5746a9912b91aa0e7be2bc71e054826d5546500aad13a8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF271830304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe951d88f6fd6f1e9f64d78a5ae0799b078c149fff8b13931b00e742070a75df7. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF271830305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9956ef1dceb0da818c84876ac7e1cb6e4f164f9427411fb8d41bfb65ed9cdf88. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK41063988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b605d8ebcc155fb49e802720810a3d7125167309718a868496134734c1c1f3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK41063989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ba38e5e39a34a8ba9edc94ca93e5af14522f525c39a537753af58549bca72e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:55:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZM62100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b815c580ebb433aa3aa5302672ef16b2c3765746314dfa2ab88b56465a2c792. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDDS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc314b67c6b72ea04abd4315ffe210654a42ceead1dc1448dfd12e2cf70ef937c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLM792310019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf92f4fb621ecf50f849a71825edb20c521c72501f5c026c501effc8f21a401. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLM792310020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278d9728aa260c0524d870886fdee598655b18ce95c27e0977542cfa02c8b5fd. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJX42400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20501b620084a6607c0762b77934c18659f252b815a8849de6b6f1f2ea468e2e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEN582400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d6e2cb3364db7fc1968cf5bd69cbe5380e4b82ea056eb329c00cde679d46c4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AU2ZC2100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a027d9c3756c020e44a1c85427be3bd6d3f1ac93ba70c5fed521c53dfc518f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUXN21803324.